Infrared sensor



FIG. 1 is a bottom, front and right side perspective view of an infrared sensor according to our design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a right side elevational view, the left side being a mirror image thereof. 

The ornamental design for an “infrared sensor,” as shown and described. 